Tread member for traction devices



Feb. 1 5 1927.

W. BAKER TREAD MEMBER FOR TRACTION DEVICES Filed March 24, 19241 Pate-med Feb. 15,1927.l

UNITED WALTER BAKER, F FAIRFIELD, IOWA, ASSGNOR TO-SPEEDER MACHINERY CORPORA- TION,OF FAIRFIELD, lOWA; `f

TREAD MEMBER FOR TR1-LOTION ,DEVICE Application filed March 24, 1924. Serial No. 701,464.

vThe object of my invent-ion is to `provide a. new'and improved linked tread member ortractors.y l c 'A further object is to provide a tread of light weight and simple, durable andineX- pensive construction.

My invention consists in the'construction, arrangementand combination of the var1-,

ous parts'of the device, whereby the objects l0 contemplated are attained, las hereinafter more vfully set forth, pointed out in niyV claims, and illustrated in the accompany-Y ing Adra-wings, in which: n y

Figure 1 is a plan view of the inner faces of three of my improved vt-read members showing the manner in which they are connected together to form a continuous tread. Figure 2 isa detail transverse sectional view of same taken on the line 2-2 ofF igporting rollers in section.

Figure 3 is an enlarged detail view showing the manner in which myimproyed tread is applied to the drive and supporting mem- 25 bers of a tractor,` only a portion of the said drive and supporting members Vbeing illustrated.

My improved tread comprises a tread, block which is formed Vpreferably of 380 wood and substantially rectangular and Vol a length somewhat greater than itswidth.

The inner face of the block 10 is provided withtwo angle Airons 11 having inwardly eX-A tending flanges 12 and horizontally Lextendr ing lianges 13. The upright flanges 12 are spacedv apart 'a slight distance'and designed to receive between them a liller bar 14.k The anglev irons 11 are shorter than the width oi, the block 10 and secured in position to the innerr face of the block by means of bolts 15, the said bolts beingpdesigned Vto extend through plates 416 on the outer facev of the i tread, as clearlyV shown in-Figure 2.V Each of thebolts 15 is provided with a'nut 17 v ure 1 showing la position of one of the sup- 19 will rest adjacent toveach otheras clearly ,FFICE. v

shown in Figure 1. Each of the ends 19 is providedlwith a hole 20. The opposite end of each of the links 18 is providedwitli a hole 21. The links 18, the flanges `l2;and

the liller bar 14 are all securedtogether by" The thicknessof the' means of rivets 22. bars 18 is. one-half of the combined, thickness ofthe flanges 12 and the filler bar 14.

By this arrangement it will be seen that two tread blocks 10 may be placed side by side and spaced apart a slight distance in such a manner that the two ends 19 ofthe bars 18ct one block-will rest between the opposite en ds oi.' the lbars 18 ofthe adjacent block with the holes 2O in alineinent with the holes l21. A y through the holes 20 and 21, the said pin be- 7o I pin 23r is then placed ing of a length slightly greaterthan the distance between the outer edgesfofthe flanges 13, and provided at each end with suitable openings for receiving Cotter pins '24.5 The pin 23 is formed preferably of ystock cold rolled shafting, no machine work being done.

0n it except cuttinginto the desired length V and drilling the holes.' Y

The outer `ends of the pins 23 are connect.- ed by llinks 25, `each of which has an offset portion 26, and each of which is provided at one end with 'an opening 27 and the opposite endV with an opening 28.- `The linksj` are,

placedYV iii position inthe manner clearly shown in Figure 1.V The said links are of 1 the same ywidthA as the links 18 and designed to'have their outer edges rest on the outer edges ofthe flange 13, and the pin 23 being of such length that when the ylinks 25 are inr` position, their inner faces will ,restagainst the outer (face of thenutsfl?, as clearlyV shown in Figure 2.` The' links are secured in position and heldfagainst outward moveplaced on the pins 23 between the links 18v and 25.

tion; The vlinks 18,.the flanges 12 and the bar 14 are all of the same-width, and -are The links 25 in turn serve the pur-V pose of locking the said nuts against, rota- 295L ment bya washer 29. and the pins 24, said links being'held against inward inoveirient'k by theV nuts 17 land rollers 24a which ,arez

31, while .the pins23 Aand the rollers'24a serve to form tractionY members to be engaged by thek sprocket teeth 32 of4 the s `I i dfiri"` vsprocket wheel 33. VVThe teeth 32 are arranged inl pairs so; as to formi a notch 34 between" which tlie1rol1ei's24:ya enter'. 1

1 `By this arrangement it will be seenthat Il have; pnovidieda linked treadv for tractors vfof simple, durable and inexpensive construe-v tionwhich may be formed of' stock inaterial and which requires ka ininiinuin` amount oit machine work, the angle barssirnply beingy cut into the proper lengthA and the holies for the bolts andl rivet-sbeing punched ordrilled.

d T he'l'bars' 18 are',V alsov fornied of stocklinaterial, andthe 't-wo. are'y alike, requiring but onefset of diesfor forming. 'The' pin 23', as beforestate'djs simply a piece oiicold rolled n shagftinghwith two holes drilledjifor the cot- *Steipins;

to drop from the' link portion of the' chain.'

c'The"tre-"adi ineniber is one .whichV is easy "Q and." quick toassemble or take apart. 'It it is'A desired" to replace av 'broken block, the 0p'- erator firstremovesl two oitthel pins by pulling the adjacent cotter' pins and then renioving tli'enfuts 17,'ai'ter which the blockl is free A' new. one caneasiljbe inserted by a reverse operation,y th'elentire change requiring but a VVfew"' iiii'nutes4 The inner edges of the bars `asbefore stated;

' 'I clann as myL invention:

lS'form a trackzfoi" supporting the rollers 30,

1i: A tread: ir'iein'berY comprising' a'. tread 7 blfoek, a: pair' of .angle irons having horizon'- ta'li andvertical flangesV arrangedn witliftheir vei'tiizalvflanges parallel' and: spaced apart, j a fillerba-i', apair of links, inejansf foi' securing saidlinks; said vertically exten'dingj iianges` and lsaid bar together, V,andu ineans for decorresponding openings, a 'link-1 for each end "f'b'lock, a `link extendingJ centrallfy a-nd' trans-Y versely across the inner surfacek ofr said i block, havingfoutwardly extending Vflanges bis" to frestfr thereon, vbolts extendingfinwardly ofs'a'id pin, andA ineansfor detachably secur ing-'fsaitllinks in positionparallel'andf spaced aparfionr the `inn-er links. treadineinber 'comprising al tread I through said block and through .said flanges,

a nut for the inner' end of eacliho saidbolts,

a pin entendi-ing transversely.. through each Y 1 endeof said links, an outer link for each end of said pinthe linkso' one 'block being cle-- signed to pivotally receive the pin of an adjacent block,y the outer linksk being designed! torest against the outer one of the facesA of said nuts to prevent said nuts fromV loosening, and means for detachably securing the' links in position onsaid pinsvto hold the links against'outward movement. Y

4. A treadin-einbercoinprisnga icctangular tread block, a pair. of angle irons "shorter than the'widt'h ov said block'r placed transversely and centrally'onrthevinnei: surface'- o'f said block, saidangleba-rs being provided" with horizontal and yvertical iianges withnth'e vertical flanges parallel and slightly 'spaced apart, a filler bar between said flanges, a link' adjacent to the outer face of each of Said verticaliianges, andv rivets for rigidly securing said links, said vertical flanges-and said Eller bar together, the ends of saidz links extending beyondA the ends of said angle irons and the edges of said block, the two` adjacent ends of said links being bent in-f wardly toL engage cach other and4 provided' with transverse openings, the opposite ends ofA said links also being providedJ withv 'opeii-` ings, the thickness ofsaid links being onehalf of the coinbined thickness-ofv said: vertical-flanges and said tillen bar, a pin eX-` tending through vsaid transverse openings of uniform diameter throughout its length# having at each end an openingt'o-receive a cot-ter pin, a pair oi' plates outwardly said tread block, bolts extending inwardly through'said platesV andV through/said horizo'ntal-Y flanges, a nut-"for the'inner end of each-'of said bolts, an outside'link for the endy of each of said pins, onejvend ofVv said linkbeing Voli-set, Vsaid links beingl of the saine length asY the iist said link-sA and with? o'penY ings inv alineinent witlrthe openings ofl the .iirst said'linlis-designed tor` receive saidv pins,

the innei'iaces of` said ontsidevlinks resting adjacent tofoneof Ythe 'outerfaces ofV .said nutsV tovhold'thesa-id link spaced apart :troni the iirst saidr link, a @otter pinetorfthe holes of saidV pin topreven-t the said outside links from; moving outwardly, the inner` edges oit said central links being designedft'o iorin a track. N

Y WALTER.inlinea.'y 

